초록 ▼

Separate left and right hydrostatic transmission (15) for controlling rotation of left and right final drive wheels (11) of a working vehicle independently are disposed laterally inwardly of the drive wheels in a vertical posture such that, while an input shaft (23) extends upwardly, an output shaft

Separate left and right hydrostatic transmission (15) for controlling rotation of left and right final drive wheels (11) of a working vehicle independently are disposed laterally inwardly of the drive wheels in a vertical posture such that, while an input shaft (23) extends upwardly, an output shaft (24) extends downwardly. To each of the hydrostatic transmissions is attached a L-shaped gear box (16) which extends over lower and outer sides of the hydrostatic transmission and supports the axle (17) of final drive wheel at its upstanding portion. within the box is housed first and second reduction gear trains which form a L-shaped transmission path between the output shaft and axle.

대표청구항 ▼

A transmission system for working vehicles which comprises: a pair of separate left and right hydrostatic transmissions for transmitting power of an engine towards left and right final drive wheels with a continuously variable speed, respectively; and left and right speed-reduction mechanisms interp

A transmission system for working vehicles which comprises: a pair of separate left and right hydrostatic transmissions for transmitting power of an engine towards left and right final drive wheels with a continuously variable speed, respectively; and left and right speed-reduction mechanisms interposed between said left and right hydrostatic transmissions and said left and right final drive wheels, characterized in: that said left and right hydrostatic transmissions (15) having top and bottom levels are disposed, respectively, laterally inwardly of said left and right final drive wheels (11) in a vertical posture such that an input shaft (23) of each of said hydrostatic transmissions extends upwardly whereas an output shaft (24) thereof extends downwardly, axles (17) of said left and right final drive wheels being disposed at a mid level between said top and bottom levels of said hydrostatic transmissions; and that each of said left and right speed-reduction mechanisms (28) is provided with an intermediate shaft (38) disposed below an inner end portion of said axle (17) and extending parallel with said output shaft (24), each of said speed-reduction mechanisms including a first reduction gear train, which comprises a smaller spur gear (39) fixedly mounted on said output shaft and a larger spur gear (42) fixedly mounted on said intermediate shaft and meshing with said smaller spur gear, and a second reduction gear train which comprises a smaller bevel gear (43) fixedly mounted on said intermediate shaft and a larger bevel gear (44) fixedly mounted on said axle and meshing with said smaller bevel gear.